I have a Sony Cybershot DSC-W55, and I've been told that I can get up to a 15 second exposure with it on "manual" mode. But I can't find where to change the exposure time (I'm not sure if "shutter speed" is the same thing).
2007-09-20 05:09:36 · 6 answers · asked by Pixton 3 in Arts & Humanities ➔ Visual Arts ➔ Photography
So...y'know, any advice on how to change the exposure time/shutter speed would be greatly appreciated.
2007-09-20 05:33:13 · update #1
Curious as to why you need a 15 second shutter speed. You realize, I'm sure, that your camera will have to be on a tripod and that such a long exposure is usually associated with night photography. To need an exposure time that long in daylight you'd be using ISO 25 and a Neutral Density Filter to reduce the effective aperture by 6 stops with the lens at f16*.
To show the relationship between shutter speed and f-stop at a given ISO lets look at this purely hypothetical example:
At ISO 25*
f2 @ 1/250 sec.
f2.8 @ 125 sec.
f4 @ 1/60 sec.
f5.6 @ 1/30 sec.
f8 @ 1/15 sec.
f11 @ 1/8 sec.
f16 @ 1/4 sec.*
At ISO 50
f2 @ 1/500 sec.
f2.8 @ 1/250 sec.
f4 @ 1/125 sec.
f5.6 @ 1/60 sec.
f8 @ 1/30 sec.
f11 @ 1/15 sec.
f16 @ 1/8 sec.
At ISO 100
f2 @ 1/1000 sec.
f2.8 @ 1/500 sec.
f4 @ 1/250 sec.
f5.6 @ 1/125 sec.
f8 @ 1/60 sec.
f11 @ 1/30 sec.
f16 @ 1/15 sec.
At ISO 200
f2 @ 1/2000 sec.
f2.8 @ 1/1000 sec.
f4 @ 1/500 sec.
f5.6 @ 1/250 sec.
f8 @ 1/125 sec.
f11 @ 1/60 sec
f16 @ 1/30 sec.
At each ISO and at each f-stop notice what happens to shutter speed.
As we increase the ISO ( a measurement of the sensitivity to light of our film or sensor) the shutter speed at a given f-stop increases. Since ISO 50 is twice as sensitive as ISO 25, at f2 our shutter speed goes from 1/250 sec. @ ISO 25 to 1/500 sec. @ ISO 50.
Each time we "stop down" to the next smallest f-stop shutter speed is reduced by 1/2. Why? Because f2.8 admits 1/2 as much light as f2; f4 admits 1/2 as much light as f2.8, etc. Therefore, the light has to expose the film or sensor for twice as long for a correct exposure.
* If you extrapolate this sequence out from f16 you'll find that at f128 (6 stops - f22, f32, f44, f64, f88, f128) your exposure with ISO 25 will be16 seconds - close enough to 15 to give a correct exposure.
2007-09-20 08:36:32 · answer #1 · answered by EDWIN 7 · 0⤊ 0⤋
Shutter speed is the same as exposure time, i.e the time the shutter opens to take a exposure. So if you can change the shutter speed on your camera, you are changing the exposure time. But whoever many questions you ask on this or any other forum, nothing beats reading the manual with the camera in your hand. that's the way to learn.
2007-09-20 06:35:20 · answer #2 · answered by rdenig_male 7 · 2⤊ 0⤋
shutter speed id th same thing. I have a Sony camera almost like yours. And i just play around with it a lot and now i know how to use it perfectly. Good thing too, because nobody else in my family can.
2007-09-20 05:17:05 · answer #3 · answered by tpirl0ver 4 · 0⤊ 1⤋
I do believe that suter speed is the rate that the shutter opens and closes to get a photograph the fater the speed the easier to take action pictures for stills you can slow it down.
2007-09-20 05:16:33 · answer #4 · answered by JENNLUPE 4 · 0⤊ 2⤋
1
2017-02-09 09:41:27 · answer #5 · answered by birney 3 · 0⤊ 0⤋
The best thing to do is go to a pro-camera store and purchase a "Magic Lantern" guide to that camera. It really helps!
2007-09-20 12:04:28 · answer #6 · answered by Steve C 1 · 1⤊ 0⤋